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  • 1
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    Solar-array-materials passive LDEF experiment (A0171) (1984)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The objective of this experiment is to evaluate the synergistic effects of the space environment on various solar-array materials, including solar cells, cover slips with various antireflectance coatings, adhesive, encapsulants, reflector materials, substrate strength materials, mast and harness materials, structural composites, and thermal control treatments. The experiment is passive and consists of an arrangement of material specimens mounted in a 3-in.-deep peripheral tray. The effects of the space environment on the specimens will be determined by comparison of preflight and postflight measurements of mechanical, electrical, and optical properties.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Langley Research Center Long Duration Exposure Facility (LDEF); p 86-87
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    NASA TECHNICAL REPORTS
  • 2
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    Evaluation of the 'mean frequency' technique (1976)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The 'mean frequency' technique, a simple procedure introduced by Bebb and Gold for the approximate evaluation of sums occurring in high-order perturbation theory, represents a useful approximation method. Its predictions compare favorably to exact results obtained by Gontier and Trahin for multiphoton bound-bound transitions in hydrogen. However, the technique can be in error if the 'mean frequency' lies near certain integers.
    Keywords: ATOMIC AND MOLECULAR PHYSICS
    Type: Physical Review A - General Physics; vol. 13
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    NASA TECHNICAL REPORTS
  • 3
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    Computing the projected area of a spacecraft solar array with matrices (1983)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Matrix methods for computing the projected area of a solar array as a function of the rotational position of a spacecraft and of array position on a spacecraft are presented. Formulas are derived which provide the optimum solar array pitch, cant and tracking angles for a given spacecraft configuration and orbit. These formulas are general and applicable to many spacecraft. Formulas are also provided for determining the energy output from an array for a given orbit and the resultant energy available to spacecraft loads. Results are simply obtained and realizable with a hand calculator. The methods above can be extended to the case of computer analysis of solar array shadowing. How this can be done is outlined and results are presented from a spacecraft study program.
    Keywords: SPACECRAFT PROPULSION AND POWER
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    NASA TECHNICAL REPORTS
  • 4
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    Results from the IMP-J violet solar cell experiment and violet cell balloon flights (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The IMP-J violet solar cell experiment was flown in an orbit with mild thermal cycling and low hard particle radiation. The results of the experiment show that violet cells degrade at about the same rate as conventional cells in such an orbit. Balloon flight measurements show that violet solar cells produce approximately 20% more power than conventional cells.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-X-71168 , X-711-76-29
    Format: application/pdf
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  • 5
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    Economical solder connections to thin films (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Soldering procedure, successfully tested for attaching leads to silicon solar cells, cover-glasses, is simple, inexpensive, and very effective in forming stable connection. Procedure uses solder of indium alloyed with either silver or tin.
    Keywords: FABRICATION TECHNOLOGY
    Type: GSC-12404 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 300
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  • 6
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    A computer program to determine geometric parameters for the AFM solar arrays (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A computer program has been written to aid in the design of the A. E. M.-1 solar array and to determine the power that will finally be available from the array. The program will plot the array output as a function of the satellite's position in a given orbit and will calculate the average output over the orbit.
    Keywords: AUXILIARY SYSTEMS
    Type: NASA-TM-X-70656 , X-711-74-121
    Format: application/pdf
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  • 7
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    Interconnecting conductively coated coverslides (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The International Sun Earth Explorer-1 has the requirement that the entire outer surface of the spacecraft be conductive. A transparent coating of indium oxide was deposited for that reason on the satellite's solar cell coverglasses in order to give them a conductive surface, and the surfaces were interconnected to ground. This paper examines the interconnector attachment problem. On the ISEE-1, wires were bonded to the coverglasses by using a conductive epoxy; the resistance of these bonds increased dramatically with time. A program was initiated to find the functional cause of the resistance increase and to flight-qualify an alternative method of bonding. It was found the tests initiated were insufficient to find the cause of resistance increase and that an alternative solution of using indium solder is acceptable for bonding wires directly to indium oxide.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: Photovoltaic Specialists Conference; Jun 05, 1978 - Jun 08, 1978; Washington, DC
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    NASA TECHNICAL REPORTS
  • 8
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    Results from the IMP-J violet solar cell experiment and violet cell balloon flights (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The Interplanetary Monitoring Platform-J violet solar cell experiment was flown in an orbit with mild thermal cycling and low hard-particle radiation. The results of the experiment show that violet cells degrade at about the same rate as conventional cells in such an orbit. Balloon flight measurements show that violet solar cells produce approximately 20% more power than conventional cells.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TN-D-8393 , G-7702-F4
    Format: application/pdf
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  • 9
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    Flight qualification test results for violet cells (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The violet solar cell has been submitted to a flight qualification program. The tasks included in this program were: to define the violet cell's electrical output from -100 C to +100 C; to determine the violet cell's degradation under 2 MeV, 1 MeV and .3 MeV proton irradiation, under a high humidity environment and under ultraviolet light; to thermal cycle two similar modules of violet cells; to flight qualify a full size violet cell panel for the IMP-J flight; and to obtain a primary balloon-flown standard of the violet cell type. The results of these tests demonstrate that the violet cell is fully qualified for space flight use with no further development work. The tests show that the violet cell offers a power increase of at least twenty-one per cent over presently available commercial cells.
    Keywords: AUXILIARY SYSTEMS
    Type: Photovoltaic Specialists Conference; Nov 13, 1973 - Nov 15, 1973; Palo Alto, CA
    Format: text
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